Woke up 5 AM in the morning for some reason, I was only on the first two or three pages of this before I fell a sleep. Decided to continue reading it in bed with my tablet ... and holy god it is so damn good. Very unpredictable, super major twists and ... the ending, although it doesn't explain itself well, the pieces are there for you to put together. This manga is from Aku no Hana author ... and so it does retain "dark theme" genre and has some amazing mature content, things start to kick off around chapters 20-22. Totally recommend this.
I'm considering to read Aku no Hana now, the rating on that one is higher ... despite the lack of adult/mature content.